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Dimensions, Tolerances & Assemblies - Coggle Diagram
Dimensions, Tolerances & Assemblies
Dimensions in drawings
Tolerance: ±, defines how much the dimension is allowed to stray
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types
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dimensioning of circle, arc and hole
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Tolerances
types
Bilateral Tolerance: allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
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Assembling
Fits
Clearance fit
In clearance fit, there would still be an allowance for two parts to move, such as in a door hinge.
In interference fit, it would be difficult to move (or remove) the two interfacing parts. Usually, a lot of force is needed to remove the two parts. Examples are shafts that are fitted through bearings, so that the shaft does not slip.
What?
multiple parts are brought together to define a larger, more complex product representation.
how?
Each component brought in needs to be oriented and located relative to other components in the assembly. Assembly joints are used between elements of components.
joints
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Revolute Joint: Has a single rotational degree of freedom, much like a hinge.
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